Ore-concentrator



(No Model.) 3 Sheets-Sheet 11.

H. P. HOLLAND.

ORE CONGENTRATUR.

No. 416,704. Patented Dec. 3, 1889.

WITNEESEE.

(No Mdem' l i 3 sheets-sheet 2.

` Y H. P.*H0LLAND. Y Y ORB QONGL'NTRATUR. No. 416,704. l Patented Dec. 3,V 1889.

WLTNEEEEE @'7/ @2m/iff RI* @idw/n@ @No Model.) s sheets-Sheena H. P. HOLLAND.

ORE UO'NGENTRATOR. I 4

` ,Patented Deo. .3. 1889.

N. PETERS. mmmHup-Pm wa-hinmn. uit;

UNITED STATES VPATENT OFFICE.

HENRY P. HOLLAND, OF SAN FRANCISCO, CALIFORNIA.'y

ORE-CONCENTRATOR.

kSPECIFICATION forming part of Letters Patent No. 416,704, dated December 3, 1889. 'l Application tiled September 5, 1887. Serial No. 248,914. (No model.) .Y

To aZZ whom t may concern:

Be it known that I, HENRY P. HOLLAND, of

My invention relates to an improved machine for concentrating and separating the heavy particles of ore pulp from the lighter and Worthless portions called gangue; and

it consists, chieiiy,.-in the employment of a blanket-belt or concentratingsurface, of a peculiar quality or style of manufacture, by which I have been able to obtain especially gratifying results, as will more fully appear in the following specification, in which reference is made to certain drawings, filed herewith, in which Figure 1 4is a side elevation. Fig. 2 is a plan. Fig. 3 is an end view. Fig. 4 is a transverse section of the endless belt. Fig. 5 is a side view of the endless belt, showing cable and edge piece. Fig. 6 is a ybottom view of the endless belt, showing the wire frame. Fig.

. 7 is a longitudinal central section of the device.

Fig. 8 is an enlarged plan viewv of a portion of the belt, showing the construction thereof. l

Before proceeding to minutely describe my invention I will state that the frame which supports and the mechanism which drives; my blanket-belt is not materially different ards I), which can be raised or lowered to increase or diminish the tension on the belt.

The stationary trough or table E, which eX- tends between the two end rollers A C, I ineline slightly, so that its lower end will be at A and its upper end at C. This trough is as wide as the machine and its bottom or floor is made of sheet metaliron or copper preferredand it may be smooth or corrugated l lengthwise. At a short distance from the roller A-say from one to two feet-I make a transverse slot a in this floor, which slot communicates with a trough or receptacle b underneath the table. This trough inclines by Vclosing its pores.

transversely across the machine, and. its lower end has a tube cl, connected with it,which leads down into the tank Q below, as represented at Figs. 1 andv 2.

The endless belt F which I use is made of woven or knitted woolen yarn, and is corrugated transversely in theweaving, so that it presents alternate elevations and depressions -on either of its sides, as shown in Fig. 5,which elevations and depressions serve as riffles.,

With woven belts, constructed either flat Y in form or with ribs extending from the upper surface thereof, it has been found from practical experience that there is a constant tendency to shrink in use, which is liable in a comparatively short space of time to, render the belt incapable of performing its function It will be readily understood th at a concentratin g-belt constructed in the manner and of the form hereinabove set forth possesses, in addition to the rifi'ies stated, the benefit of the elasticity of the wool, and also a remedy for its tendency to shrink. It `will be further understood that something of the advantages of the rubber belt is gained in addition to the permeability of the knit goods. In order to prepare this blanket to serve as `a belt, I bind its edges with canvas, duck, or some .equivalent 1nel'astic material g, and I secure to each edge a narrowstrip h, of india-rubber, leather, or othertlexible substance that will extend up and rest upon the shallow sides of the trough or table E, thus forming a trough-shaped belt for the pulp to move in. I then securea flexible wire rope or cord f along the under side of each edge, and these two ropes or cords I connect at intervals by cross wires or cables 7c 7c, which form a iiexible connection that is sufficiently rigid to preserve the tension and shape of the blanket-belt, and at Ioo a spray or series of water-jets are forced from the perforations against the inner side of the belt with sufficient force to cleanse the interstices of the belt from adhering particles.

In operation the pulp from the battery is fed upon the belt near its upper end through a spout P, and a stream of Water is also fed upon the belt just behind the spout P. The belt is kept moving steadily in the direction shown by the arrow, so that the pulp and Water travel in the same direction ona slight downgrade. During the travel of the belt down the grade the pulp will iiow over the ribs of the blanket-belt as if they were riiles and the heavy particles will set-tie into the depressions between the ribs and either pass into or through the interstices of the belt or become entangled in the fibers of the belt. If the particles are very small, they may passentirely through the belt and kfall upon the platform or table underneath it, in which case the water will carry them down until they pass through slot a, and into the trough or receptacle b, and thence through the tube d into the tank Q,below. The other particles which lodge on the endless belt or in its interstices will be carried around until they'are either washed off into tank Q or brushed off by the brush L. Gangue is discharged from the belt at the lower end of the machine.

In order to catch and save the fine gold which iioats on the surface of the water, coinmonly known as slimes or float-gold, I employ a floating skimmer S, which is constructed as follows and anchored in the trough:

T is a tube having a longitudinal opening in it. This tube is long enough to extend across the endless belt. It has other tubes U, connecting it at right angles with a corresponding parallel tube T', and this latter tube is connected at one end by a flexible tube V, which leads down into a barrel Wr below-the machine. Thel slotted or open side of the tube T is upstream, so that as the skimmer iioats on the surface of the water a thin iilm of the `surface-waterwill ilow into the slot, and thence pass through the connecting-tubes U into the parallel tube T', and thence down through the tube V into the barrel below.

I do not confine myself to this particular construction of a skimmer, as it can be variously constructed and yet perform the same duty; but the one herein described Will serve the purpose. l/Vhen the fine gold is once collected in the barrel, it can easily be precipitated and recovered. By this means and apparatus I can save the finest particles of metals and sulphurets, as well as the coarse particles.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

l. An improved concentrating-surface consisting of a belt having alternate elevations and depressions woven on either side thereof, as shown.

2. An. improved concentrating-surface consisting of a Woven or knitted woolen belt having alternate elevations and depressions permanently formed on either side thereof, substantially as shown, and for thepurposes set forth.

3. In an ore-concentrator, the combination, with the main frame thereof, and the rollers A, B, and C, of an endless concentrating-belt passing over said rollers and having alternate elevations and depressions woven therein, and a iiexible backing for said belt.

4. A concentrating-belt formed of porous or textile material and having alternate elevations and depressions woven therein, an inelastic binding-piece g, secured to the edges of said belt, and a flexible strip h, also secured to the edges of said belt, in combination with a table, to the sides of which the upper portion of said strip h is secured.

In witness whereof I have hereunto set my hand.

HENRY P. HOLLAND.

Witnesses:

JOHN W. STEWART, M. G. LOEFLER. 

